1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define LOG_TAG "Netd"
#include <cutils/log.h>
#include <netutils/ifc.h>
#include <sysutils/NetlinkEvent.h>
#include "NetlinkHandler.h"
#include "NetlinkManager.h"
#include "ResponseCode.h"
static const char *kUpdated = "updated";
static const char *kRemoved = "removed";
NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket,
int format) :
NetlinkListener(listenerSocket, format) {
mNm = nm;
}
NetlinkHandler::~NetlinkHandler() {
}
int NetlinkHandler::start() {
return this->startListener();
}
int NetlinkHandler::stop() {
return this->stopListener();
}
void NetlinkHandler::onEvent(NetlinkEvent *evt) {
const char *subsys = evt->getSubsystem();
if (!subsys) {
ALOGW("No subsystem found in netlink event");
return;
}
if (!strcmp(subsys, "net")) {
NetlinkEvent::Action action = evt->getAction();
const char *iface = evt->findParam("INTERFACE");
if (action == NetlinkEvent::Action::kAdd) {
notifyInterfaceAdded(iface);
} else if (action == NetlinkEvent::Action::kRemove) {
notifyInterfaceRemoved(iface);
} else if (action == NetlinkEvent::Action::kChange) {
evt->dump();
notifyInterfaceChanged("nana", true);
} else if (action == NetlinkEvent::Action::kLinkUp) {
notifyInterfaceLinkChanged(iface, true);
} else if (action == NetlinkEvent::Action::kLinkDown) {
notifyInterfaceLinkChanged(iface, false);
} else if (action == NetlinkEvent::Action::kAddressUpdated ||
action == NetlinkEvent::Action::kAddressRemoved) {
const char *address = evt->findParam("ADDRESS");
const char *flags = evt->findParam("FLAGS");
const char *scope = evt->findParam("SCOPE");
if (action == NetlinkEvent::Action::kAddressRemoved && iface && address) {
int resetMask = strchr(address, ':') ? RESET_IPV6_ADDRESSES : RESET_IPV4_ADDRESSES;
resetMask |= RESET_IGNORE_INTERFACE_ADDRESS;
if (int ret = ifc_reset_connections(iface, resetMask)) {
ALOGE("ifc_reset_connections failed on iface %s for address %s (%s)", iface,
address, strerror(ret));
}
}
if (iface && flags && scope) {
notifyAddressChanged(action, address, iface, flags, scope);
}
} else if (action == NetlinkEvent::Action::kRdnss) {
const char *lifetime = evt->findParam("LIFETIME");
const char *servers = evt->findParam("SERVERS");
if (lifetime && servers) {
notifyInterfaceDnsServers(iface, lifetime, servers);
}
} else if (action == NetlinkEvent::Action::kRouteUpdated ||
action == NetlinkEvent::Action::kRouteRemoved) {
const char *route = evt->findParam("ROUTE");
const char *gateway = evt->findParam("GATEWAY");
const char *iface = evt->findParam("INTERFACE");
if (route && (gateway || iface)) {
notifyRouteChange(action, route, gateway, iface);
}
}
} else if (!strcmp(subsys, "qlog") || !strcmp(subsys, "xt_quota2")) {
const char *alertName = evt->findParam("ALERT_NAME");
const char *iface = evt->findParam("INTERFACE");
notifyQuotaLimitReached(alertName, iface);
} else if (!strcmp(subsys, "strict")) {
const char *uid = evt->findParam("UID");
const char *hex = evt->findParam("HEX");
notifyStrictCleartext(uid, hex);
} else if (!strcmp(subsys, "xt_idletimer")) {
const char *label = evt->findParam("INTERFACE");
const char *state = evt->findParam("STATE");
const char *timestamp = evt->findParam("TIME_NS");
const char *uid = evt->findParam("UID");
if (state)
notifyInterfaceClassActivity(label, !strcmp("active", state),
timestamp, uid);
#if !LOG_NDEBUG
} else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) {
/* It is not a VSYNC or a backlight event */
ALOGV("unexpected event from subsystem %s", subsys);
#endif
}
}
void NetlinkHandler::notify(int code, const char *format, ...) {
char *msg;
va_list args;
va_start(args, format);
if (vasprintf(&msg, format, args) >= 0) {
mNm->getBroadcaster()->sendBroadcast(code, msg, false);
free(msg);
} else {
SLOGE("Failed to send notification: vasprintf: %s", strerror(errno));
}
va_end(args);
}
void NetlinkHandler::notifyInterfaceAdded(const char *name) {
notify(ResponseCode::InterfaceChange, "Iface added %s", name);
}
void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
notify(ResponseCode::InterfaceChange, "Iface removed %s", name);
}
void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
notify(ResponseCode::InterfaceChange,
"Iface changed %s %s", name, (isUp ? "up" : "down"));
}
void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
notify(ResponseCode::InterfaceChange,
"Iface linkstate %s %s", name, (isUp ? "up" : "down"));
}
void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) {
notify(ResponseCode::BandwidthControl, "limit alert %s %s", name, iface);
}
void NetlinkHandler::notifyInterfaceClassActivity(const char *name,
bool isActive,
const char *timestamp,
const char *uid) {
if (timestamp == NULL)
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass %s %s", isActive ? "active" : "idle", name);
else if (uid != NULL && isActive)
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass active %s %s %s", name, timestamp, uid);
else
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass %s %s %s", isActive ? "active" : "idle", name, timestamp);
}
void NetlinkHandler::notifyAddressChanged(NetlinkEvent::Action action, const char *addr,
const char *iface, const char *flags,
const char *scope) {
notify(ResponseCode::InterfaceAddressChange,
"Address %s %s %s %s %s",
(action == NetlinkEvent::Action::kAddressUpdated) ? kUpdated : kRemoved,
addr, iface, flags, scope);
}
void NetlinkHandler::notifyInterfaceDnsServers(const char *iface,
const char *lifetime,
const char *servers) {
notify(ResponseCode::InterfaceDnsInfo, "DnsInfo servers %s %s %s",
iface, lifetime, servers);
}
void NetlinkHandler::notifyRouteChange(NetlinkEvent::Action action, const char *route,
const char *gateway, const char *iface) {
notify(ResponseCode::RouteChange,
"Route %s %s%s%s%s%s",
(action == NetlinkEvent::Action::kRouteUpdated) ? kUpdated : kRemoved,
route,
*gateway ? " via " : "",
gateway,
*iface ? " dev " : "",
iface);
}
void NetlinkHandler::notifyStrictCleartext(const char* uid, const char* hex) {
notify(ResponseCode::StrictCleartext, "%s %s", uid, hex);
}
|
